Rockhounding.org

20 - B

Indiana
Directions
Next site in IndianaHolocystites (Sepulticystis) spangleri-Triamara tumida Assoc., Middle Osgood Lst · 15 mi

Can I collect here?

Pro
See who owns this land and whether it is claimedPro shows the owner, the claim on this spot and every claim within a mile.
Read the collecting rules by land type

Based on our latest records, with claims updated from the BLM on Oct 3, 2026. Land and claims can change quickly, so check before you go.

Minerals on record here

1 mineral

Recorded here: fossil.

Nearby sites

All of Indiana
13 miLouisvilleFossil13 miLouisville (quarry area)Fossilized Quarry, petrified wood15 miHolocystites (Sepulticystis) spangleri-Triamara tumida Assoc., Middle Osgood LstFossil

More fossil sites in Indiana

See them all

More sites in Indiana

View all Indiana sites
The Market

New on the Market

Native American arrowheadNative American arrowhead$20cubedmoons3Browse the Market

Found something here? List it for sale

About 20 - B

20 - B is a fossil collection site in Indiana, cataloged in the Paleobiology Database. Fossils here come from the Brassfield Formation, dated to the Llandovery (443.1–432.9 million years ago). The depositional environment is recorded as carbonate indet. Documented finds include Walliserodus curvatus, Acodus, Carniodus carnulus, Distomodus kentuckyensis, Drepanodus, Paltodus.

Geologic setting

Formation
Brassfield
Geologic interval
Llandovery
Age
443.1–432.9 Ma
Depositional environment
carbonate indet.
Recorded occurrences
18

Fossils found here

Walliserodus curvatus
Conodonta · Belodellidae
Acodus
Conodonta · Balognathidae
Carniodus carnulus
Conodonta · Pterospathodontidae
Distomodus kentuckyensis
Conodonta · Distomodontidae
Drepanodus
Conodonta · Protopanderodontidae
Paltodus
Conodonta · Drepanoistodontidae
Paltodus dyscritus
Conodonta · Drepanoistodontidae
Panderodus
Conodonta · Panderodontidae
Panderodus unicostatus
Conodonta · Panderodontidae
Distomodus staurognathoides
Conodonta · Distomodontidae
Exochognathus brassfieldensis
Cyclostomi · NO_FAMILY_SPECIFIED
Trichonodella
Conodonta · NO_FAMILY_SPECIFIED
Oulodus walliseri
Conodonta · NO_FAMILY_SPECIFIED
Rexroadus kentuckyensis
Conodonta · NO_FAMILY_SPECIFIED

Records and references

Data: Paleobiology Database collection 180931 (CC BY 4.0) — view the source record

Getting there

No directions yet.

How hard is it?

Getting there
– / 5
Finding anything
– / 5
Votes
0

Trip reports

No trip reports yet.

Questions about 20 - B

Can you collect at 20 - B?

It depends on who owns the land and whether a mining claim covers it. BLM land usually allows hand collecting for personal use, national parks allow none, and private land needs the owner’s permission. Pro members see the owner and any claims at this spot.

What minerals are found at 20 - B?

Fossil.

Comments

This site is protected by reCAPTCHA and the Google Privacy Policy and Terms of Service apply.

No comments yet.

What to bring

The whole kit
  • Estwing E3-22P Rock PickThe industry-standard 22oz geological hammer. One-piece forged steel with shock-reduction grip.See it on AmazonCompare picks
  • Clear Anti-Fog Safety Glasses (4 Pack)Adjustable, anti-fog lenses for clear vision in any conditions.See it on AmazonCompare picks
  • Watertight Medical KitCompact, waterproof first aid kit with bandages, moleskin, and field essentials.See it on AmazonCompare picks
  • Indiana Rocks!: A Guide to Geologic Sites in the Hoosier StateA Story of oceans, uplift, and ice, Indiana's geological history is reflected in the vistas and landscapes you will see ...See it on Amazon

As an Amazon Associate we earn from qualifying purchases.

Meteorite nearbyA 73 kg iron meteorite was found at Nelson County in 1856, 26 miles from here.

Source: Paleobiology Database.